Plaster paris must be cut into pieces and dipped into water by another person while the person that did the cutting appliesit to the person that wants the mask. Do two thick layers wait for twenty minutes when it drys carefully remove the mask off of th eperson face. Remember before you have the plaster applied to your face make sure you put vaseline all over your face and weare a showercap. Have fun and thank to a teacher in Edmonton at St. Rose